Heating system for wax-thread sewing-machines



S. A. DOBYNE.

, HEATING SYSTEM FOR WAX THREAD SEWING MACHINES.

APPLICATION FILED FEB. 10, 1917- L 2 Hm 0 m J MHM n u n n m 01- :FL :F--- P m d. o 3 a u m a s Z mu w o 1 1b 0/ 0 9 I 3, n 1

, 'IY sawms. A. DOBYNE.

HEATING SYSTEM FOR WAX THREAD SEWING MACHINES. APPLICATION FILED FEB. 10. 1911.

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machine, itjis tain newand useful Im rovement in s'rnrimn A. 1103mm. orsr. A uacnmnmr comm, or

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To all whom/it may concern:

Be it known that I, STEPHEN A. DOBYNE, a citizen of the United States,and residing at St. Louis, Missourhhave invented a Heating Systems for Waxhread Sewing Machines, of which the following is a specification. T

Thisi'nvention relates to wax thread sew ing machines, and more particularly, ,to a

heating system therefor.

In the. operation of a .wax thread sewing necessary that the wax thread and the devices which handle the thread be heated, in order to keep the waxand the thread in proper condition, and in order that the thread handling devices may operate satisfactorily. Where a heating flame is used to heatthe thread handling devices, this flame is liable to have a destructive effect on' the mechanism and overheat or b rn the wax on the thread or in the wax pot. It is, therefore desirable that the thread handlin devices be heated uniformly and sufiicient y to keep the thread and the thread handling devices inproper condition, but not to overheat the same.

Some of the objects of this invention,

therefore, are to provide a heating system for wax thread sewing machines, which is electrically controlled, and in which this electrically controlled heating means is so constructed and arranged as to heat the thread and the thread handling devices uniformly, but with the smallest consumption of energy. I

Further objects will appear from the detail description taken in connection with the accompanyin drawings, in which Figure-1 is a ront elevationof a sewing machine embodying this invention;-

Fig. 2 is a side elevation; and Fig-3' isfla section onthe line 3 -3, Fig. 1. In the accompanying drawings, the system is shown as applied to the machine shown and described in U. 8. Patent No. 1,198,627, granted Septi19, 1916, and similar parts. are indicated by similar reference characters, as in said application.

' Referring to the machine head having mounted therein adrive shaft 10, supportingcams 12,13 and 14 adaptedto-opxerate the various parts of the machine, ;T

Specification 01 Letters Patent. Application fine February 10, 1917i Serial No. 147,941.

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draw1ngs, 9 designates a e machine head has'a for- Louis, mssounr, amma r0 cannon anon s'r. LOUIS, mssoum, n conrona'rron or ms- 'nmrmesys'rmr'roa snwme-inc'mims.

Patented Sept. 20, 19 21.

ward-1 projecting part or lug-8, which is provi ed with bearings and forms a support or carrier for the various parts hereinafter described.v This forwardly projecting part has mounted thereon a work table 15, a cooperating vpresser foot 16, an awl 17 a needle 18, and a looper 19, comprising the,

stitch forming mechan'ism. The shuttle is shown at 20, and-is mounted in, a shuttle casing200 on the carrier 8. A'take-up shaft 27, mounted in bearings in the carrier 8, has

a take-u arm 28 provided with a truck or roller 72 engaging the needle thread 51, and inthis part 8 1s also.v mounted a thread tension 30 controlled by a brake 36.. Also mounted on the part 8 is an auxiliary take-up or tension 42, All of these parts are fully described in the applicationreferred to, to which reference is had for further details of construction.

Mounted onor formed integralwith the carrier 8 is a wax pot7having a. cover 70,

and also mounted on'this carrier 8 .1s an auxiliary tension 71. The needle thread 51 passes through an eye 73 and hence through-the tension 71 downwardly through thewax pot,around thetension 30, the auxiliary take-up 42, the take-up roll 72, the looper 19, and through the usual slot in the work table 15.

Formed on the'forwardly projecting part 8 is a boss 6 which is bored to removably receive an electrical resistance coil 5, which is in the form of a cartridge, and which may be of usual construction, the electrical connections to this coil being shown at 4. The shuttle casing'200 has also attached thereto or formed integral therewith a metallic boss 2, which is also bored to receive an electrical coil 1 being. shown at O. The heating elements ,1 and 5' are removably mounted in their bosses, so as to be replaceable, and it 4 will be noted that when in position, the are inclosed by the metallic bosses, an therefore, make-a thermal conducting connection with the carrier8 of the machine head. The take-up arm 28 has mounted therein a head 3 which ma be formed integral with thetruck'or r0 1 72, or may be loosely mounted on the same stub shaft 5 therewith, andlthis. head en ages the side the carrier 8 which is machined to face of 4o ingna tro ing mechanism including a, take-up metal, this metalbulk will act to store a' considerable amount of heat and distribute the heat uniformly throu h the body of the carrier. 8. This heat wilfi therefore, beapplied uniformly to the wax t, the tensions, the take-ups and the shutt e. In the case of the tensions and the shuttle the latter are practically. in direct. metallic contact with the metal bulk of the machine head. In the case' of the long take-up, the sliding connection between the truck or roll and the machine face will furnish an eflicient conducting connection. The result, therefore, is that all of the thread handling devices will be heated uniformly and efiiciently, with the minimum amount of electrical energy, and by proper heating elements, the cat generated and conducted to the thread handling devices is sufiicient for the-purposes required.

It is obvious that various changes may be made in the details of construction without .departing fromthe spirit of this invention,

- on said head and supporting and it is, therefore, tobe understood that this invention is not to be limited to the specific construction shown and described.

Having thus described the invention, what is claimed is: a v

1. In a wax-thread se machine; havmachine head and having thread conmember ha a thread-engaging part, the employment 0 a metallic carrier mounted said member hav' a linear y sliding thermal contact with said carrier, andelectrical resistance heating means mounted on and inthermal contact with said carrier and adapted to heat said member through its sli contact with said carrier.

2. a wax-thread sew' machine, hav- I a machine head-and having thread conpfoportioning of the said member,

trolling mechanism including; a take-up 3. In a wax-thread sewing machine liav-.

ing a machine head and having a movable thread controlling member, a metallic carrier mounted on said head, a pivot adapted to support said member on said carrier, and

aneIement making sliding thermal contact with said carrier adapted to convey heat to said member.

4. Ina wax-thread sewing machine having a machine head and having a movable thread controlling member, a metallic carrier mounted on said head and having a plane face, means for. movably supporting said member on said carrier, and contact means for conveying heat from said face to said member.

5. In a wax-thread sewing machine hav- Y ing a machine head and having a movable thread controlling member, a metallic carrier mounted on said head and havin a plane face, means for movablysupportmg said member on said carrier, and an element makin" sliding thermal contact with said face a apted to convey'heat tosaidmember.

6. In a wax-thread sewing machine, a heat distributer, means for heating said distributer, a movable thread controlling member, and'a contact element mounted on. said member and making linearly sliding thermal contact with said-distributer in order to heat said member.

7 In a wax-thread sewing machine, a heat distributer having a plane face,-means for heatin said distributor a movable thread contro ing member, an a contact element mounted. on said member and making linearly sliding thermal contact with said face in order to heat'said member.

In testimony whereof I aflix my signature this 11th day of July, 1916.

STEPHEN A. DOBYNE. r 

